1=0
2=1200
3=68000 
4=250000 
5=640000 
6=1600000 
7=4000000 
8=10000000 
9=22000000 
10=40000000  
11=90000000  
12=95000000  
13=142500000 
14=213750000 
15=320625000 
16=480937500 
17=721406250  
18=1082109375 
19=1623164063 
20=2100000000